What problem does it solve? Multi-author research projects lose time when collaborators must dig through git history and scattered notes to understand what changed, what is blocked, and how to run the pipeline locally. This Skill produces a single concise handoff brief covering the delta since the last brief, the state of each artifact, open questions, reproduction steps, and restricted-data access procedures. ## Core Features & Use Cases - Delta Summarization: Groups commits by area (manuscript, analysis, slides, infrastructure) since a tag, date, or the previous brief, with sensible fallbacks. - Artifact Status Roll-up: Reports manuscript, analysis, and slides state plus reproducibility passport results (PASS / FAIL / EXPLAINED) in a compact table. - Onboarding Support: Documents environment restore commands (renv, pip, Stata) and restricted-data access steps without exposing confidential values or credentials. - Use Case: Before sending a co-author the repository, run the brief so they receive a one-page summary of changes since last week, open decisions, and exact commands to reproduce the analysis on their machine. ## Quick Start Ask the assistant to write a coauthor handoff brief covering changes since the last tag for your collaborator.